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- Electrical and Electronic Formulas version 2.02
- Copyright (C) 1990 - 1992 Miller
-
- Introduction:
-
- This program contains a collection of basic electrical and electronic
- formulas, which can be found in any electrical engineering handbook.
- The software was developed, in an effort, to alleviate the necessity
- of looking up individual formulas each time they are needed. This
- software includes the most commonly used electrical formulas.
-
- The software was complied to include the use of a math coprocessor,
- if one is present. The coprocessor will be emulated if one is not
- found in your system.
-
- Differences:
-
- This release contains all the features of version 1.00, plus a new
- on-screen calculator. Some additional minor maintenance changes
- were also put into effect in this version.
-
- File Index:
-
- EEF .EXE : 76816 Bytes, Electrical and Electronic Formula program
- EEF .DOC : 13373 Bytes, file containing general program information
- EEFELEC.DBF : 21280 Bytes, file containing the world wide voltage chart
- EEFHELP.DBF : 12880 Bytes, file containing general help information
-
- System Requirements:
-
- The program minimum requirements are as follows...
-
- Any XT compatible computer
- DOS version 3.0 or later
- 256K memory
- A color monitor
- A floppy or hard disk drive
-
- Installation:
-
- The program, including support files, is compact enough that it will
- run satisfactorily on a floppy disk. If a hard disk is available it
- should be used, this will allow faster access to the data files as
- they are needed. Type each of the following lines into the computer,
- at the DOS prompt, to install on a hard disk system.
-
- MD FORMULA <ENTER> Make a directory
-
- COPY A:EEF*.* C:\FORMULA /V <ENTER> Copy files to new directory
-
- CD\FORMULA <ENTER> Change to new directory
-
- EEF <ENTER> Execute the program
-
- A batch file can be created to allow easier loading of the program.
- This file should be located in the root directory of the hard drive.
- Type each of the following lines into the computer, at the DOS
- prompt, to create a batch file.
-
- COPY CON C:\EEF.BAT <ENTER>
-
- CD\FORMULA <ENTER>
-
- EEF.EXE %1 %2 %3 <ENTER>
-
- ^Z <ENTER>
-
- To execute the program, change to the root or formula directory, and
- type EEF, followed by any of the command options available.
- If the DOS path is set to include the root and formula directories,
- changing to a particular directory will become unnecessary. Refer to
- your DOS manual for instructions on using the path command.
-
- Command Line Options:
-
- When loading the program, you have several options available. By
- including /Fxx and /Bxx, on the command line, the colors you want to
- use will be set automatically. If you include /NB the sounds,
- generated when an error is made, will be suppressed. The color codes
- can be copied from the color select screen, they are displayed in the
- box marked "Current Choice". The /FXX option sets the foreground
- color, while /Bxx sets the background color. Following are several
- examples of valid command line entries...
-
- EEF/F11 Set foreground light blue
-
- EEF/F11/B01 Set foreground light blue / background blue
-
- EEF/F11/B01/NB Set foreground light blue / background blue
- / suppress sound
-
- GENERAL INFORMATION:
-
- Select the proper subject from the main menu. Once the new menu is
- displayed you will have to select an appropriate topic. The computer
- will then display this screen. The first few lines, starting at the
- top of the monitor will give a brief description of the area you have
- accessed. If a prompt will require more than a one character
- response, then a window will be displayed. The window has a wrap
- feature, which works as follows; as the window becomes filled,
- characters on the left will be dropped, as new characters are added
- on the right side of the window. The BACKSPACE key can be used to
- eliminate characters, from the right side of the window, one at a
- time. When you are sure that you have entered the data properly,
- press the ENTER key, this will allow the computer to read and store
- the data. When all the necessary data has been entered the computer
- will solve for the unknown value, or perform a conversion, and
- display the result. The escape (ESC) key is always enabled, and can
- be used in any area, to exit and return to the most recent menu. Use
- this method to exit the program, and return to DOS, from the main
- menu.
-
- ELECTRONIC:
-
- This section of the program will calculate various electronic related
- formulas as listed below...
-
- Ohms law (DC) Coupled inductance
- Ohms law (AC) Impedance
- Resistance total Resonance
- Capacitance total Admittance
- Inductance total Susceptance
- Mutual inductance Conductance
-
- Most sections will calculate several different derivatives of a
- formula, for instance, the resonance area has the capability of
- solving not only for resonance, but also capacitance, or inductance
- in a resonant circuit. In the areas where this is possible, you will
- be given several choices then, by user selection, the formula for the
- specified quantity will be performed. The formula used to arrive at
- the result is displayed on the screen at the end of any calculation.
- The standard print screen function can be used to obtain a hard copy,
- the screen is also time and date stamped, as a further aid to the
- user.
-
- ELECTRICAL:
-
- This section of the program will calculate various electrical related
- formulas as listed below...
-
- Efficiency Required fuse, wire size
- Power factor Wire resistance
- Amperes from horsepower Voltage drop
- Amperes from kilowatts Conduit fill
- Amperes from kva Kvar sizing
- Kilowatts and KVA Supply systems
-
- The left column represents formulas that can be used for calculating
- both single and three phase circuits. The other formulas are not
- phase dependant and can be used for any circuit configuration.
- Efficiency and Power Factor are calculated and displayed on the
- screen as a percent. Also, when entering data at an Efficiency or
- Power Factor prompt, the data must be input as a percent. The supply
- system area calculates the current draw, by a load, on any
- conventional power system. This is convenient for 60hz to 50hz
- conversions. The formula used to arrive at the result is displayed on
- the screen at the end of most calculations. The standard print screen
- function can be used to obtain a hard copy, the screen is time
- stamped, as a further aid to the user.
-
- NUMBER SYSTEMS:
-
- This section of the program will evaluate, and change a quantity in
- one number system to an equivalent value in another system. The
- number systems used in this section are as follows...
-
- Decimal (base 10)
- Hex (base 16)
- Octal (base 08)
- Binary (base 02)
-
- The current lower and upper conversion limit is:
-
- Decimal:+/-1048575
- Binary :1111 1111 1111 1111 1111
- Octal :3777777
- Hex :FFFFF
-
- If a value outside these limits is entered, or calculated, an error
- message will be displayed indicting an overflow has occurred.
-
- WORLD WIDE VOLTAGE DATABASE:
-
- This section of the program provides a current list of the worlds
- electric power supplied to consumers. The list covers a wide range of
- countries, and includes frequency, system (wye/delta), single phase
- voltage, and three phase voltage, when available. All voltages listed
- are alternating current (AC). A wye or star system will have a high
- voltage that is 1.732 times the low voltage, for example 120/208. A
- delta system will have a high voltage that is 2 times the low
- voltage. If a single voltage is listed under the single phase
- column, then it can be assumed that the consumer has only the one
- voltage available, and that it is a two wire service, (one phase wire
- and one neutral). Two voltages listed under the same column would
- indicate that the consumer has a three wire service, and both are
- available, (two phase wires and one neutral). A three phase service,
- when available, will normally be furnished with four wires, (three
- phase wires and one neutral). The higher voltage listed can be either
- single or three phase, but the lower voltage will always be single
- phase.
-
- Calculator:
-
- An on-screen calculator is available most everywhere, while the
- program is running. To access this feature just press the F(1) key.
- A short list of special functions will be displayed, along with the
- calculator itself. The capabilities include the normal four basic
- functions, plus squaring, square root, reciprocal, and exponential
- math. The current result in the display can also be exported back to
- the main program.
-
- Disclaimer:
-
- The author accepts no responsibility for the application of this
- software, the result obtained, any errors or omissions contained
- herein. This material is subject to change without notice.
-
- Comments:
-
- The author welcomes comments good or bad, input from users is very
- important to future releases of this software. Please feel free to
- contact me on Compuserve (73407,546), or at the address below.
-
- Registration:
-
- This program is copyrighted, and is offered as shareware software. If
- you find this software useful, and plan to retain and use it, then
- please register the program, by doing so you will be assured of being
- informed of any updates. Please send the form below, along with
- $20.00, to the address shown.
-
- Name:___________________________________________________________
-
- Address:________________________________________________________
-
- City, State:____________________________________________________
-
- Zip Code:_______________________________________________________
-
- Country:________________________________________________________
-
- Version You Are Using:__________________________________________
-
- Gregory J. Miller
- 2303 Bennington Place
- Maryland Heights, Mo. 63043